Glyphithyreus wetherelli 

Glyphithyreus wetherelli is the most common crab across the London Clay formation. It is very small and can often be found in the shingle patches of the beach in small nodules. Very occasionally it can be found in large septarian nodules. It is not often preserved with claws and legs attached. It is synonyms with Plagiolophus wetherelli which is an older name for it. 

It has been found at Sheppey, Butt Cliff and Maylandsea.